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One To Many Unidirectional(Hibernate)

 
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Following is a program to demonstrate working of One to Many association.
Its not working.I am also pasting the exception raised. Please Find out the fault.

CollegeEntity



StudentEntity


college.hbm.xml


hibernate.cfg.xml



TestClient



Output in the Console

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
drop table College_stud cascade constraints
drop table student_coll cascade constraints
create table College_stud (College Code number(19,0) not null, College Name varchar2(255 char), primary key (College Code))
create table student_coll (id number(19,0) not null, name varchar2(255 char), college_stud_fk number(19,0), primary key (id))
alter table student_coll add constraint FKFEDA1270A10B24A7 foreign key (college_stud_fk) references College_stud
Success1
Success2
Success3
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not retrieve snapshot: [org.nit.CollegeEntity#1]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.persister.entity.AbstractEntityPersister.getDatabaseSnapshot(AbstractEntityPersister.java:1065)
at org.hibernate.engine.StatefulPersistenceContext.getDatabaseSnapshot(StatefulPersistenceContext.java:269)
at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:212)
at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:535)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:103)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:527)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:523)
at org.nit.TestClient.main(TestClient.java:50)
Caused by: java.sql.SQLException: ORA-00923: FROM keyword not found where expected

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:213)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:796)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1031)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:836)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1124)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3285)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3329)
at org.hibernate.persister.entity.AbstractEntityPersister.getDatabaseSnapshot(AbstractEntityPersister.java:1038)
... 9 more




 
Kunal Lakhani
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No reply yet.
 
Kunal Lakhani
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Please help me out. I am facing this problem in many associations examples
 
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i think your problem lies in the SQL statement generated for creating the table..

also try to avoid having a blank space in a db column name, this should fix your problem.
 
Kunal Lakhani
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Yes, that's working. Thanks a lot Anantha Sharma. I was fed up of this problem.
 
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